Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income		$ 1,272	$ 1,246	$ 2,493	$ 2,375
Other comprehensive income (loss):
Foreign currency translation adjustments, net of tax		9	6	(39)	15
Cash flow hedges, net of tax		0	1	1	2
Net other comprehensive income (loss)	[1]	9	7	(38)	17
Comprehensive income		$ 1,281	$ 1,253	$ 2,455	$ 2,392

[1] All amounts are net of tax.